JavaScript arrayBuffer byteLength Property

The Javascript arrayBuffer.byteLength is a property in JavaScript that return the length of an ArrayBuffer in a byte. ArrayBuffer is an object which is used to represent fixed-length binary data. 

Difference between property and function in javascript. Property in JavaScript is nothing but a value whereas method is a function this can be understood with a help of an example given below. 

Syntax:

arraybuffer.byteLength

Example:

Input: geeksforgeeks
Output: 13

The bytelength property returns the length of an ArrayBuffer in bytes. ArrayBuffer is an object which is used to represent fixed-length binary data. 

Example:

Input: ArrayBuffer(2)
Output: 2

Example: Here as we can see the property of the object car, is going to store the string as “Audi” and it can be accessed with car.name. The sayModel is a method i.e, a function of the object and it can be accessed with car.sayModel(). It can be noticed that sayModel is just a function that uses ().

javascript

// car is an object.
let car = {};

// car.name is a property of the given object.
car.name = "Audi",

    // car.sayModel is a function of the given object.
    car.sayModel = function () {
        console.log("A8");
    }

// printing property value.
console.log(car.name);

// printing function called value.
console.log(car.sayModel());

Output: 

"Audi"
"A8"

Difference between bytelength and length property: Length property returns the length of a String object i.e, the number of characters in the string object. 

Example: Let’s see the JavaScript program on this property.

javascript

// ArrayBuffer is created with
// some size in bytes.
let A = new ArrayBuffer(2);

// Here the byteLength property
// is used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer in bytes is printed.
console.log(B);

Output:

2

Example: In this example, we will see the usage of Array.bytelength property.

javascript

// ArrayBuffer is created
// with some size in bytes.
let A = new ArrayBuffer(0);

// Here the byteLength property
// is used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer
// in bytes is printed.
console.log(B);

Output:

0

Example: In this example, we will see the usage of Array.bytelength property.

javascript

// ArrayBuffer is created
// with some size in bytes.
let A = new ArrayBuffer("geeksforgeeks");

// Here the byteLength property is
// used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer
// in bytes is printed.
console.log(B);

Output:

0

Example: In this example, we will see the usage of Array.bytelength property.

javascript

// ArrayBuffer is created
// with some size in bytes.
let A = new ArrayBuffer(4.6);

// Here the byteLength property
// is used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer
// in bytes is printed.
console.log(B);

Output:

4

Example: A negative number can not be taken as the size in byte only positive integer values can be taken including zero. 

javascript

// ArrayBuffer is created
// with some size in bytes.
let A = new ArrayBuffer(-2);

// Here the byteLength property is
// used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer
// in bytes is printed.
console.log(B);

Output:

Error: Invalid array buffer length

Example: A complex number can not be taken as the sizes in bytes only positive integer values can be taken including zero. 

javascript

// ArrayBuffer is created with
// some size in bytes.
let A = new ArrayBuffer(2 + 4i);

// Here the byteLength property
// is used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer
// in bytes is printed.
console.log(B);

Output:

Error: Invalid or unexpected token

Example: The sizes in byte should be less than otherwise it returns Error: Invalid array buffer length. 

javascript

// ArrayBuffer is created with some size in bytes.
let A = new ArrayBuffer(2338945720394852703948572);

// Here the byteLength property is
// used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer in bytes is printed.
console.log(B);

Output:

Error: Invalid array buffer length

Application: Its application is to get the length of an ArrayBuffer in bytes.

javascript

// ArrayBuffer is created
// with some size in bytes.
let A = new ArrayBuffer(23);

// Here the byteLength property
// is used for checking the size.
let B = A.byteLength;

// Length of the ArrayBuffer
// in bytes is printed.
console.log(B);

Output:

23

We have a complete list of Javascript Array methods, to check those please go through this Javascript Array Complete reference article.

Supported Browser:

• Google Chrome
• Internet Explorer
• Firefox
• Opera
• Safari